Fully Adjustable Carbine Buttstock assembly to mount to a carbine rifle (6-positions mil-spec or commercial tube) – This is our carbine stock Additional 1? height on cheek rest 3-axis Adjustable Butt Plate Assembly extends additional 1 1/16? length of pull and includes the following movement: Horizontal for linear adjustment (i.e. length of pull) Vertical for a perfect butt plate fit into the curvature of the shoulder. Lateral adjustment for a ½ inch left or right cast This butt plate assembly is interchangeable with the original MBA-1 Buttstock Includes a Picatinny Rail on the bottom rear of the Stock Body to attach your choice of many accessories. Designed a flat bottom index set screw (10-24) to eliminate that constant rattle of carbine collapsible buttstock. This also allows you to secure the stock in your favorite position. The Black MBA-3 comes with a medium soft rubber recoil pad, Duro 85. The FDE MBA-3 comes with a FDE hard butt plate as a pad. A Black medium soft rubber recoil pad is available for additional purchase. The Luth-AR MBA-3 weighs roughly half that of comparable stocks coming in at just 18.5 ounces. Fits all .223 and most .308 AR carbine style rifles Super Strong Glass Filled Nylon Easy to replace and quick to install Uses 4 out of the 6 positions on a mil-spec or commercial tube Features Ergonomic Adapts To Existing Commercial and Mil-Spec Buffer Tubes Certain after Market Commercial Buffer Tubes that exceed 1.172? may not fit The vertical struts for the MBA 3 are fixed therefore the cheek pc is not reversible like the MBA 1 however the cheek piece itself is designed with a cheek pad for the lefty NOT interchangeable with A2 standard buffer tube. You will need to purchase a MBA-1 or MBA-2 to fit the A2 tubes Compatible Buffer Assemblies: .223 Mil-Spec Carbine Buffer Assembly .223 Commercial Carbine Buffer Assembly .308 Mil-Spec Carbine Buffer Assembly .308 Commercial Carbine Buffer Assembly Additional Information It does not include the f